#include<stdio.h>
#include<conio.h>
#include<math.h>
int main()
{
    float a,b,tong,tich,hieu,thuong;
    printf("nhap a,b: ");
    scanf("%f%f",&a,&b);
     tong= a+b ; tich=a*b; hieu=a-b; thuong= a/b;
    printf("tong la: %f",tong);
    printf("tich la: %f",tich);
    printf("hieu la: %f",hieu);
    printf("thuong la: %f",thuong);
     getch();
     }
